Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcee81baa1a67c28…

MALICIOUS

PDF

32.9 KB Created: 2020-08-02 13:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c14dc7a656b1d3027c592c569cc4681 SHA-1: 63f5122d174556bb470cb8148ebe13d098f8ce46 SHA-256: dcee81baa1a67c2884efc4e6671097ab2b1bfd82ee84908f02f31937f4e3ad4c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a mass of external links, many of which are hosted on Shopify domains and appear to be part of an SEO link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is presented in the document body alongside what appears to be obfuscated text. This suggests the document is designed to trick users into visiting malicious sites by disguising the true intent behind seemingly innocuous content like song lyrics.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=blind+melon+no+rain+lyrics
    • http://files.littlerevelend.com/uploads/1/3/1/4/131454373/lavifufujowi.pdf
    • http://files.evolvingtruths.com/uploads/1/3/0/7/130739081/903252.pdf
    • http://files.doreenleafdesigns.com/uploads/1/3/1/4/131453636/tivorimeluxitot.pdf
    • http://files.gothicmusicarchive.com/uploads/1/3/1/4/131452958/06af562dd94e8.pdf
    • https://cdn.shopify.com/s/files/1/0440/0663/7726/files/pagenusigoneb.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/vuxuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0598/files/sakazagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/tiziduzatizakip.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/66214200486.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/435550730.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/18456406366.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/lovov.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/poxifakobunasilune.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mujunevuduw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004605.bin
60a486a4f8d06517bf6623f7e0678d464ae0bea930f74a563e93ecacf71e3449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4605 5236 bytes
font_01_sfnt_off000057c0.bin
1ad454e5eb1ff7a962831caf4031d1ca6a8b25db9aca3729e5e9107aaaf31253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C0 9280 bytes

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